Thiede , A , Parkkonen , L , Virtala , P , Laasonen , M , Makela , J P & Kujala , T 2020 , ' Neuromagnetic speech discrimination responses are associated with reading-related skills in dyslexic and typical readers ' , Heliyon , vol. 6 , no. 8 , 04619 . https://doi.org/10.1016/j.heliyon.2020.e04619
Title: | Neuromagnetic speech discrimination responses are associated with reading-related skills in dyslexic and typical readers |
Author: | Thiede, A.; Parkkonen, L.; Virtala, P.; Laasonen, M.; Makela, J. P.; Kujala, T. |
Contributor organization: | DyslexiaBaby Cognitive Brain Research Unit Department of Psychology and Logopedics Behavioural Sciences HUS Head and Neck Center Korva-, nenä- ja kurkkutautien klinikka HUS Medical Imaging Center BioMag Laboratory Mind and Matter |
Date: | 2020-08 |
Language: | eng |
Number of pages: | 12 |
Belongs to series: | Heliyon |
ISSN: | 2405-8440 |
DOI: | https://doi.org/10.1016/j.heliyon.2020.e04619 |
URI: | http://hdl.handle.net/10138/322131 |
Abstract: | Poor neural speech discrimination has been connected to dyslexia, and may represent phonological processing deficits that are hypothesized to be the main cause for reading impairments. Thus far, neural speech discrimination impairments have rarely been investigated in adult dyslexics, and even less by examining sources of neuromagnetic responses. We compared neuromagnetic speech discrimination in dyslexic and typical readers with mismatch fields (MMF) and determined the associations between MMFs and reading-related skills. We expected weak and atypically lateralized MMFs in dyslexic readers, and positive associations between readingrelated skills and MMF strength. MMFs were recorded to a repeating pseudoword /ta-ta/ with occasional changes in vowel identity, duration, or syllable frequency from 43 adults, 21 with confirmed dyslexia. Phonetic (vowel and duration) changes elicited left-lateralized MMFs in the auditory cortices. Contrary to our hypothesis, MMF source strengths or lateralization did not differ between groups. However, better verbal working memory was associated with stronger left-hemispheric MMFs to duration changes across groups, and better reading was associated with stronger right-hemispheric late MMFs across speech-sound changes in dyslexic readers. This suggests a link between neural speech processing and reading-related skills, in line with previous work. Furthermore, our findings suggest a right-hemispheric compensatory mechanism for language processing in dyslexia. The results obtained promote the use of MMFs in investigating reading-related brain processes. |
Subject: |
515 Psychology
Dyslexia Magnetoencephalography (MEG) Speech processing Mismatch field (MMF) Reading skills Verbal working memory Behavioral neuroscience Cognitive neuroscience Applied linguistics Clinical psychology Cognitive psychology EVENT-RELATED POTENTIALS MISMATCH NEGATIVITY MMN AUDITORY SENSORY MEMORY DEVELOPMENTAL DYSLEXIA WORKING-MEMORY FREQUENCY DISCRIMINATION PHONEME REPRESENTATIONS BRAIN RESPONSES SCHOOL-CHILDREN FAMILIAL RISK 6162 Cognitive science |
Peer reviewed: | Yes |
Rights: | cc_by |
Usage restriction: | openAccess |
Self-archived version: | publishedVersion |
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